Franz thinks and ferdinand stemmler



F. TRINKS L F. STEIVIMLER.

COMPUTING 0R CALCULATING MACHINE.

APPLICATION man 11111.11, 1916.

1,1 94,900. Patented Aug. 15, 1916.

lll 1| 4 EMM.

UNITED sTATEs PATENT ornicn.

FRANZ TRINKS AND FERDINAND STEMMLER, OF BRUNSWICK, GERMANY.

COMPUTING 0B CALCULATING MACHINE.

Application filed January 4, 1916.

To all whom t may 00m/cm s Be it known that we, FRANZ TnrNxs, manufacturer, and FERDINAND STEMMLER, workmaster, citizens of the Duchy of Brunswick, Empire of Germany, residing at Brunswick, Germany, have invented certain new and useful Improvements in Computing or Calculating Machines of which the following is a specification.

This invention relates to computing or calculating machines, and in particular to computing machines of the class having shiftable operating teeth for setting up numbers and items in the machine.

The object of our invention is to provide in machines of this class actuating means for automatically preventing, during the operation of the main operating lever, alterations in the setting of the operating teeth which have been previously shifted into operative position, and to provide actuating means lto permit the operating teeth to be shifted for setting up numbers and items.

Referring to the accompanying drawings, in which an embodiment of our invention is illustrated by way of example: Figure 1 represents a transverse section of a computing machine embodying the invention. Fig. 2 is a View, similar to Fig. 1 of a part of the setting-up mechanism but showing some parts in a different relative position. Fig. 3 is a plan view partly in section of the machine with the larger number of parts removed, only the parts necessary for the proper understanding of this invention being shown. Fig. 4 is an end view of a detent device which forms a part of this invention.

The machine for which our invention is particularly applicable isA of the type described in U. S, Patent No. 946,867, and the present invention is shown in the drawings yand will be described as applied to a machine of such a type. The operating teeth 11 are slidingly mounted in the disk 6 which is fixedly secured upon the shaft il, the said operating teeth 11 being adapted to be shifted into operative position by means of a cam groove 12 in the disk 7 which is mounted co axially with the disk 6 but which may be moved independently of the disk 6 by means of the lever or handle 15. The cam disk 7 is provided with circularly disposed indentations 14: which are engaged by a spring actuated pin 13 slidably mounted in the disk 6. The wedge shaped tip of the said pin 13 corresponds to the shape of the indentations Specification of Letters Patent.

Patented Aug. 15, 1916.

Serial No. 70.229.

14 which are spaced apart so as to correspond to the division and number of the operative teeth 11 in the disk 6. In revolving the said cam disk 7 the yieldable locking pin 13 is moved radially inward until the next indentation 14 is in position to be engaged by the said pin, in which position the cam disk 7 is thenflocked unless the resistance of the spring of the locking pin. 18 is again overcome to permit the cam disk 7 to be advanced another step. Thus, the stations of the cam disk 7 are determined by the position of the indentations 11 which correspond to the number and division of the operating teeth 11 in the disk 6. This prevents any of the operating teeth 11 from being but partly projected when being shifted into operative position.

Our invention consists in making the shaft 4: tubular and mounting within such tubular shaft a rotatable shaft h. The shaft Ll; is provided with radial openings j into which project, and in which are guided, the stems of the pins 13, when the latter are in their normal locking position. Radial holes z' are formed in the inner shaft 71 which holes z' correspond in number to the openings j of the shaft -t and are positioned to register with the said openings j when the inner shaft t, for that purpose, is turned relatively to the outer shaft 4. The stems of the pins A13 are of such a length that the inner end must enter into the bore hole i to permit the outer wedge shaped end of the pin 13 to ride over any one of the teeth formed by the indentations 14 in the cam disk 7.

Uien the desired number of operating teeth are shifted into operative position and the main machine handle 18 which actuates the shaft i and the plurality of disks 6 through a pair of gear wheels 19, 20, is to be operated, a novel device comes into operation for automatically locking each of the cam disks 7 in its set position to the disk G, which device 'will now be explained.

As shown in Fig. 3, the inner shaft it is provided at one end with a helical spring al which has one end secured to a stationary part of the machine frame and tends to turn the shaft z into the position shown in Fig. 1 in which the bore holes z' are out of register with the openings j in the tubular shaft 4t. This position of the inner shaft 7L with respect to the outer shaft Linay be called the normal locking position in which none of the operating teeth 11 can be set up since the cam disks are locked against independent rotation. lllhen it is desired to shift operating` teeth into operative position, the inner shaft 71. must first be moved into inoperative position for Which the following' mechanism is provided: .Parallel to the shafts -l and /1/ there is mounted in the niarhine frame a slidable rod of provided with a sprine rl that tends to move the rod a: toward the right hand end of the machine ivhcre a slide r mounted in stationaryv guides nl and u2. rthis slide /U has an oblique operating face w1 a gaiiist ivhich the end of the rod m bears under the action of the spring` r1. lllhen the said slide fr is manuallj moved in the direction of the arroiv in Fi l Y action of the spring frlocated ivithin the guide u1. the said oblique operating face 'nl of the slide o rides over the end of the slidalile rod :l: vvhich is thereby moved toward the opposite side of the machine. ivhere the rod of is provided `vvith an oblique operating face 'ie vvhich bears against a lever c 'ixedly connected to a inojecting' end of the inner shaft L. When the rod a: is moved to the left the lever c is aused to rock the inner shaft /i ivhieh thereupon assumes the position shoivn in Fis'. in vvhich the bore hole 'if registers vvith the opening` (i in the outer shaft if. ln

this position. the. shaft 7i` is retained b v a detent r latch provided preferablyv at the same end of the machine as the operating handle 1S. The latch arm is pivotallif' mounted at the side of the stationed-57 machine frame and is under the intluence of a suitable sprin.T ivhich tends to hold the latch arm s in engagement vvi'th a notch provided in a collar which is iixedly secured upon the inner shaft 7i. The operative position of the detent or latch is illustrated in Fig'. ft. in which the shaft Zi. is in the san e position shou'n vin lfig. Q and in which the openings e', and 7' are in register to permit the teeth l-t to ride over the pin and thus permit of settingup an)v desired number of operatingY teeth 11. As shoivn in Fie. if. the deteut is provided ivith another arm s adapted to he engaged b v a` cam 7'; which is secured upon lthe shaft 1T of 'the main operating' handle lo and revolves vvit-h the hitter. The arm s serves to release the detent .e when the operating` handle 1S, and incidentally the cam t. is being`- revolved. lllhen thus released. the inner shaft 7L ivill. by the` action of the helical spring' /ll be restored to the normal lockiiiej position shoivn in Fig. l and in ivhich the vieldablv mounted locking, pin 13 is prevented by the unbored portion of the inner shaft 71, from moving` radially inward. so that the cam disk T is locked and cannot be shifted independentl)7 of the teeth bearing' disk (l.

lllhen it is desired to again unlock the locking' pin 13 and render the same vi-eldable, it is onlvv necessauvv to push the slide i;

0*. o and against the in the direction indicated hy the arroiv in Fig. 3, whereupon the shaft It is again caused, through the agency of the bar a: and the arm c, to rock into the position in which the detent becomes operative to retain the said shaft until automaticall)v released through operation of the handle l5.

lllhile ive have shoivn in the (,lraivings suitable structural means for cariving` our invention into effect7 \ve desire it lto be understood that the said means may be structurally varied ivithin ivide limits ivithout departure from the scope and spirit of our invention.

ll'hat 7vve claim and desire to secure b v Letters l'atent of the United States, is:

l. in a computing machine the combination of a tubular revoluble shaft; a disk mounted on said shaft lnrvinf;- operating;` teeth slidabl)7 mounted therein; a second disk mounted coaxiall'vY vvith and in proximitv to said first disk and adapted, ivhen rotated relative to the latter, to shift said teeth into operative position, said second disk having' indentations cmrespondine` in number and position to the teeth in the first disk; a spring-actuated lockingl pin slidabljv mounted in said first disk and adapted to ene'age the indentations in said second disk; said tubular shaft ha ving` a radial aperture to receive one end of said locki ng pin; a shaft mounted vvithin raid tubular shaft and having a radial depression adapted. when said inner shaft is rocked, to be brought into register vfith said aperture in said tubular shaft to permit the inner end of said locking pin to enter said depression and the outer end of said locking pin to ride over said indentations ivhen said second disk is being' nitated; an arm on said inner shaft; mains for rockin;r said arm to bringthe depression in the inner shaft into register ivith the aperture in the tubular shaft; and a springv actuated detent for retaining said last-mentioned shaft in said last mentioned position.

In a comprit-ringmachine, the combination of a revoluhle shaft having a radial opening; an actuating' lever (operatively connected to ,'aid shaft; a disk mounted on said shaft having` operating" teeth slidably mounted therein; a second disk mounted coarxiall)v vvith and in proximit)Y to said first disk and adapted to shift said teeth into operative position, said second disk having indentations corresponding` in number and position to the teeth in said .first disk; a spring-actuated locking pin slidablv mounted in said first disk and havin;r its lower end projectine into the openingY of said tubular shaft and its upper end adapted, to engage the indentations in said second disk; said inner shaft having` a depression adapted, ivhen the latter shaft is rocked. to he brought into register ivith the radial opening in said CIK tubular shaft and receive the inner end of said locking pin and permit the outer end of said locking pin to ride over said indentations when saidsecond shaft is rocked; an arm on said inner shaft; a pair of coperating spring-actuated slides to oseillate said arm; a spring-actuated detent for retaining said inner shaft in rocked position and actuated by said actuating lever in the initial part of its movement for releasing said detent.

8. In a computing machine, a revoluble tubular shaft; a plurality of sliding numberoperating teeth carried by said shaft; means mounted on said shaft adapted, When actuated, to shift said teeth into and out of operative position; means carried by said tubular shaft to lock said teeth-shifting means thereto in set position; a rock shaft Within said tubular shaft cooperating With said locking means and adapted, when in normal position, to maintain said locking means in locked position and when in rocked position to release said locking means; means tending to maintain said rock shaft in the former position; means for rocking said rock shaft into ijlnlocling position; and means for securing the rock shaft in rocked position.

.4. In a computing machine, a revoluble tubular shaft; a plurality of sliding numberoperating teeth carried by said shaft; means mounted on said shaft adapted, when actuated, to shift said teeth into and out of operative position; means carried by said tubular shaft to lock said teeth-shifting means thereto in set position; a rock shaft Within said tubular shaft copeiating With said locking means and adapted, when rocked, to release said locking means and When in normal position to secure said locking means; means tending to maintain said rock shaft in the latter position; means for rocking said rock shaft into unlocking position; means for securing said rock shaft in rocked position; and means coperating With said tubular shaft adapted, when the latter is restored to normal position, to release said rock shaft securing means.

5. In a computing machine, a revoluble tubular shaft having a radial opening; a spring-actuated plunger mounted in said radial opening; a plurality of sliding number-operating teeth carried by said shaft; means rotatably mounted on said shaft adapted, When actuated, to shift said teeth into and out of operative position and having indentations for engagement by said plunger to lock said teeth-shifting means to said tubular shaft; a rock shaft mounted within said tubular shaft and having a radial depression adapted, When said shaft is rocked, to be brought into register With the radial opening of said tubular shaft to receive said plunger and permit the indentations of the teeth-shiftingmeans to ride over said plunger; means normally tending to rock said inner shaft into a position With its radial depression out of register with the opening of the tubular shaft; means to rock said inner shaft to bring its radial depression into register With the radial opening of the tubular shaft; means to automatically secure said inner shaft in its latter position, and means associated with said tubular shaft adapted, When the latter shaft is rotated, to release said securing means.

In testimony whereof We have hereunto set our hands'in presence of two subscribing witnesses.

FRANZ TRINKS. FERDINAND STEMMLER.

Vitnesses IVILI-IELM LEHRKE, EUGENE C. HARTER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). C. 

